According to the passage, when people grow fond of one particular brand of a product, its sales will _____.
A、decrease gradually
B、remain at the same level
C、become unstable
D、improve enormously
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试题解析
细节题。依据第一段倒数第二句“people became attached to one brand and sales leveled off (stage of maturity). Sales went into a slight decline ...”，过了一段时间之后，人们开始被某一种牌子的产品所吸引，销售开始进入成熟期。level off平稳，稳定，即没有大的波动。这与B项一致。
